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Accueil du site > Publications > Publications 2007 > Phase separation and flux quantization in the doped quantum dimer model on the square and triangular lattices

Phase separation and flux quantization in the doped quantum dimer model on the square and triangular lattices

A. Ralko, F. Mila, D. Poilblanc

par Didier Poilblanc - 17 avril 2007

The doped two-dimensional quantum dimer model is investigated by numerical techniques on the square and triangular lattices, with significantly different results. On the square lattice, at small enough doping, there is always a phase separation between an insulating valence-bond solid and a uniform superfluid phase, whereas on the triangular lattice, doping leads directly to a uniform superfluid in a large portion of the RVB phase. Under an applied Aharonov-Bohm flux, the superfluid exhibits quantization in terms of half-flux quanta, consistent with Q=2e elementary charge quanta in transport properties.